Henry



(No Model.) 5 Sheets-Sheet 1. H. APPLEBY.

BLAST PIPE.

No. 391,931. Patented Oct. 30, 1888.

'INVENTDR:

WITNESSES:

N FEIERS. Pham-Lmw her. Washington, 0.6

(No Model.) 5 Sheets-Sheet 2. H. APPLEBY.

BLAST PIPE.

No. 391,931. Patented Oct. 30, 18,88.

INVENTUR:

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. Paten 30 6 w narl/ll? i m a 5 Sheets-Sheet 4.

(No Model.)

H. APPLEBY.

BLAST PIPE.

No. 391,931. Patented Oct. 30, 1888.

WITNESSES 5 Sheets-Shem 5.

(No Model.)

H. APPLEBY.

BLAST PIPE.

Patented 001;

R O T N E V N WITNESS-E5 Q WW N. PETERS, Flwlo-Llllmgmphqr. Waahinglfln. D. C.

"Uniifri; rates Arnnr Fries.

HENRY APPLEBY, OF LIMERICK, IRELAND.

BLAST-PIPE.

SPECIFICATION forming part of Letters Patent No. 391,931, dated October 30, 1888. lmlication filed October 12, 1887. Serial No. 252,125. (No model.) Patented in England July ll 1887. No. 10,128.

To all w7z am it may concern.-

Be it known that I, HENRYAPPLEBY, asubect of the Queen of Great Britain and Ireland, residing at Limerick, Ireland, have invented new and useful Improvements in and connected with Blast'Pipes, (for which I have applied for Letters Patent of Great Britain, No. 10,128, of July 19, 1887,) of which the following is a specification.

This invention relates to improvements in blast-pipes for locomotive and other boilers, in which a steam jet or blast---usually the eX- haust-steam escaping from the cylindcrsis employed for inducing the requisite draft through the furnace and heating-tubes, and in the means whereby such draft may be varied and regulated according to the duty to be performed. My invention is, however, applicable under other circumstances where it is desired to set a body of air in motion with the aid of a stcanijct. When applied to a 1000- motive or other boiler, I sometimes provide means whereby live steam may be conveyed from the boiler direct to the blast'pipe for use in creating a draft when the engine is standing and when exhaust-steam from the cyhnd ors is not available for the purpose.

My 1nvention relates to that type of blastplpcs having an air-inlet arranged below the outlet from the central steam-nozzle; and in order that it may be readily understood I will proceed to describe the same with reference to the accompanying drawings, whereof- Figures 1 and 2 represent in longitudinal and transverse section, respectively, the smokebox end of a locomotiveengine furnished with a blast-pipe constructed and applied according to my improved method. In Figs. 3 and 41s represented to an enlarged scale and in fuller detail the mode in which I prefer to construct the blast-pipe itself, the former of these being a sectional elevation and the latter a part plan and part horizontal section. Fig. 5 1s a view on a large scale illustrating the device for automatically controlling the valve of the blastpipe.

The blast-pipe consists of a central steamnozzle, a, of suitable length, provided at some distance below its upper or delivery extremity with a series of lateral passages, a, which lead to an annular steam-passage, a, surrounding and by preference extending some distance above or beyond the extremity of the central nozzle, a. Between the central nozzle and the outer stcanrpassage, a is an annular chamber or passage, 1), open to the atmosphere below and serving to convey the air or other gases contained in the lower portion of the smoke box into the blast-pipc, where they become subjected to the influence of the steam issuing from the central nozzle, a. The outer annular steam-passage, a", is fitted with an annular valve, a whereby the escape of steam from the main supply-pipe through such supplementary passage may be partially or wholly intercepted. The annular valve a has a ringlike form and plays over the inner face of the outer casing, a, in the direction of its axis, said casing serving as a guide, and it finds a seat at a on the inner casing, a. This valve is furnished with studs (0, which work in slots (0 in the outer casing, to, and by means of suitable connections, as indicated by way of example in dotted lines in Figs. 1 and 2, may be raised or lowered from the foot-plate of the locomotive or other convenient position. The outer casing, a, is securely attached to the flange a and does not partake of a rotative movement.

Assuming my improved blastpipe to be applied to a locomotive, the apparatus occupies the usual position in front of the outlet ends of the fire-tubes, the air-inlet to the intermediate passage, 1), being situated ator about the level of the lower rows of firetubes and the upper extremity of the outer steanrpassage, a being at or about the level of the upper rows of fire-tubes. Under these circumstances the draft through the lower and upper tubes is equalized. Then the stcampassage a is closed,the whole of the exhaust-steam is forced through the central nozzle, a, and the blast, owing to such concentration, is intensified. Furthermore, the jet acts with greater effect upon the gases drawn from the lower portion of the smoke-box through the intermediate passage, b. When, on the other hand, the steam-passage a is partially or fully opened, a portion of the steam escapes through the supplementary passage a the collective area for delivery is increased, and the blast modified. Moreover, the portion of the steam which es capes by way of the passage a has no effect upon the gases contained in the smokebox until the upper extremity of the blast-pipe is reached, at which level the influence of the means whereby the apparatus may be wholly or partially worked with live steam from the boiler. For this purpose -I provide the apparatus near its base with a nozzle, to which a steam-pipe may be attached, and whereby the blast-pipe may be worked when exhauststeam from the cylinders is not available for the purpose.

\Vhen it is desired to render the action of the apparatus automatically adjustable, I provide means, which 1 have illustrated in Fig. 5, whereby the annular valve to or its equivalent is opened or closed as the steam rises above or falls below its normal pressure, such means being operated by the varying steamprcssure in the boiler.

In Fig. 5 c is the rod whereby motion is communicated to the blast-pipe-regulating valve a, the said rod being worked by an automatic apparatus consisting of a steam-cylinder, (1, containing a piston connected by a rod, d, to the shaft or rod 0. The steam-passages d d are normally closed by a slide-valve, d, the latter being attached by means of suitable connections to the free end of a bent tube, 6, to which steam is admitted from the boiler through a pipe, 6. The steam-chest of the cylinder (1 is supplied with steam from the boiler by means of a pipe, f. The movement of the free end of the tube 0 in either direction as variation in the internal pressure takes place causes steam to be admitted to the steamcylinder (1 upon one side or the other of the piston, and thus operates the regulating-valve of the blast-pipe.

I do not in this application broadly claim the annular passages b and a", surrounding the central nozzle of a blast-pipe, and a valve controlling the passage a, as this is illustrated in thepending application of Appleby and Robinson, Serial No. 247,650, and claimed therein.

Observing that the present application for Letters Patent is made within the term of priority of seven months prescribed by Article 4 of the International Convention for the Protection of Industrial Property, of March 20, 1888, a British patent for the invention having been applied for on the 19th of July, 1887, No. 10,128,

Iclaim as my invention and desire to secure by Letters Patent- 1. In a. blast-pipe, the combination, with a central steam-nozzle, of a surrounding annw lar steam-passage communicating therewith, an intermediate annular air-passage open at its lower end, and a valve arranged to work in an axial direction and serving to control the escape of steam by way of said outer or supplementary steam-passage.

2. In a blast pipe, the combination of the central nozzle, a, provided with tubular branches a, the outer casing, a, secured to the tops of said branches, the inner casing, a, provided with a valve-seat, a, on its outer face in the annular passage (6 and the valve af, mounted in the passage a and arranged to move to and from its seat in the direction of its axis and that of the nozzle a, substantially as set forth.

8. The combination, with a blast-pipe having two steam-passages, an air or gas passage, and a regulating-valve controlling one of said passages, of a steamcylinder, a piston therein connected with said regulatingvalve of the blast-pipe, a valve controlling the admission of steam from the boiler to the opposite ends of said cylinder, a vent-tube, as 0, open to the steam in the boiler, and a connector which couples the said tube 0 to the valve of said steam-cylinder, substantially as set forth.

4. In a blastpipe, the combination, with the regulatingvalve of the same, of means whereby said valve is actuated'by the pressure in the boiler and automatically regulated according to the variations in said pressure, said means consisting of a steam cylinder open to the boiler and its valve, a piston in said cylinder,connecting with the regulating-valve of the blast-pipe, and a bent tube open to the steam in the boiler and connected with and actuating the valve of said cylinder, substantially as set forth.

HENRY APPLEBY.

IVitnesses:

JAMES W. SMALLMAN, CHAS. H. Snon'r. 

